U know it's all about what plants u can get your hands on. Here u can get any if u have the time to look for them or to much money and as i dont have to much money, i invested time.
Once u have all plants, roots, soil etc put them in one by one and then just look at the aquarium for a bit.
Use your imagination to see what fits where, arange, rearange, slap yourself, rearange more.
In the end u get what u want.
Takes time, tons of anger management, a few good walls to punch, some tips that u can get right here on this forum and u are set :).
Most aquascapes that u see on the web took lots of time to make, mine is just a ford in a mercedes world but for now i am happy with it and eager to see it finished.
After i'm done i'm planing a 6 gallon aquascape that i HOPE i can pull off... We shall live and we shall see